SIP Revision: Transportation Control Measures / Vehicle Miles Traveled, May 3, 2000 Revision to the State Implementation Plan for Transportation Control Measures (TCMs) adopted on May 3, 2000. http://www.tceq.texas.gov/airquality/mobilesource/may2000tcm.htmlhttp://www.tceq.texas.gov/@@site-logo/tceqlogo-3colors.gif